diff --git a/doc/BlockChain.py b/doc/BlockChain.py
index 5947c62c..6e1ce89b 100644
--- a/doc/BlockChain.py
+++ b/doc/BlockChain.py
@@ -96,7 +96,6 @@ class BlockChain(object):
                 'url': 'webapp/index.php?c=BlockChain&a=buyMallProduct',
                 'params': [
                     _common.ReqHead(),
-                    ['currency', '', "选用币种 目前只支持CEG USDC USDT"],
                     ['goods_uuid', '', '商品唯一id'],
                     ['price', '', '出售价格'],
                 ],